HelloRadioSky V15 Ultra ELRS 2.4GHz 915MHz Dual Band Radio

The HelloRadioSky V15 Ultra breaks the mold of traditional FPV transmitters by packing heavy-duty hardware and built-in diagnostic tools directly into your radio bag. Powered by an H7 processor running custom EdgeTX firmware and anchored by a high-performance Gemini 1W RF platform, the V15 Ultra delivers exceptional link reliability, buttery-smooth control latency, and massive range performance.

Featuring butter-smooth RDC metal gimbals, an expansive 4.3″ IPS colour touchscreen, turbo-fan active cooling, and dual-band antennas housed inside a slick translucent-accented chassis, this transmitter is built to perform under pressure.

What truly sets the Ultra apart is the integrated HRS Tools suite paired with an EXT multi-function test port. Leave your standalone checkers and meters at home—the V15 Ultra functions as a portable field lab, capable of decoding protocols on the fly and fast-charging your gear at up to 20W.

Key Highlights & Features

• Gemini 1W RF Platform: High-output power delivery for rock-solid link performance and long-range confidence.

• Built-In Field Lab / HRS Tools: Features an EXT multi-function test port (GND / +5V / SIG) with built-in signal analysis and safety cut-offs.

• Auto Measure Protocol Decode: Automatically detects PWM, PPM, SBUS, CRSF/ELRS, SUMD, DJI RS, and MAVLink (up to 16 channels) with live scope readouts.

• 1–6S Cell Meter: Directly plugs into balance leads to display per-cell voltage bars, pack voltage, state of charge (SOC), and cell imbalance (dV).

• 20W USB-C PD Fast Charging: Features live monitoring of voltage, current, wattage, and SOC while juicing up your gear.

• RDC Metal Gimbals: CNC-style precision mechanics delivering an exceptionally smooth, adjustable stick feel.

• Active Turbo-Fan Cooling: Keeps the internal electronics running cool during intense bench sessions or hot summer race days.

Technical Specifications

• Brand / Model: HelloRadioSky V15 Ultra (Black-Gold Edition)

• MCU / Processor: ARM Cortex-H7

• Firmware: EdgeTX (HelloRadioSky V15 specialized build)

• RF Protocol: ExpressLRS (Gemini system architecture)

• Display: 4.3″ IPS Colour Touchscreen

• Gimbals: RDC Metal Hall/Potentiometer hybrid precision gimbals

• Charging & Power: USB-C Power Delivery (PD) up to 20W fast charging

• EXT Port Pinout: Pin 1 (GND), Pin 2 (+5V with ~1A overcurrent cut-off), Pin 3 (SIG with 5V max overvoltage protection)

• Signal Analysis Timebase: 100µs to 50ms scope range

• Output Support: Servo output (~50 to 560Hz) / ESC output (DShot150 / DShot300)

• Unit Weight: Approx. 730g